﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;

namespace Scan
{
    public partial class PictureControl : Control
    {
        private int imageIndex = 0;

        public int ImageIndex
        {
            get { return imageIndex; }
            set
            {
                imageIndex = value;
                this.Invalidate();
            }
        }

        private Image backgroundImage;

        public Image BackgroundImage
        {
            get { return backgroundImage; }
            set { backgroundImage = value; }
        }

        public PictureControl()
        {
        }

        protected override void OnPaint(PaintEventArgs pe)
        {
            // TODO: 在此处添加自定义绘制代码

            SolidBrush brush = new SolidBrush(SystemColors.ActiveCaption);
            pe.Graphics.FillRectangle(brush, this.ClientRectangle);
            brush.Dispose();

            if (this.BackgroundImage != null)
            {

                ImageAttributes attr = new ImageAttributes();
                attr.SetColorKey(Color.Magenta, Color.Magenta);

                pe.Graphics.DrawImage(this.backgroundImage, this.ClientRectangle, imageIndex * 16, 0, 16, 16, GraphicsUnit.Pixel, attr);

            }
            // 调用基类 OnPaint
            base.OnPaint(pe);
        }
    }
}
